Casting-machine.



A. BLATTSTEIN.

CASTING MAGHINE.

APPLICATION-FILED JULY 28, 1914.

Patented Jan. 12, 1915.

casrmmonmn v at New York, in the countyof New York and State of New York, have invented new and useful Improvements in Casting-Machines, of which the following is a specification.

The general object of this invention is to dispense with the cumbersome and expensive" apparatus at present employed for effecting the introduction of molten metal into aflask or mold-in the operation of making gold, or other metallic, inlays for cavities in teeth, by substituting therefor an apparatus designed for holding the molten metal and the mold and susceptible of being operated by hand and in such manner' as to efl'ect the introduction of the molten metal into the mold by centrifugal force. 7 And to these ends the invention resides in providing a holder for the mold and adapting this holder to be readily rotated in a circle when held by hand;

fication, panying" drawings, forming to' Partly in section of the casting machine.

I Other objects will ap ear and be'better understood from that em odiment of my invention of which the followingis aspecireference being had to the accompart hereof, in wh1ch: i e Figure 1, is a contracted side elevation Fig. 2,- is a detail side elevation partly in section of one end of a modified form of maehine., Fig. 3, is a detail side View of one end ofa further modified form of machine. Fig. 4, is a side elevation showing the pattern supported by the flask cover. Fig. 5, is a' side elevation of a cluster of v 'ifilays br castings.

to m'ake an inlay-e casting In proceeding principle of my inin accordance with the l'vntien the c y the tooth is treated prepared in; the ordinary manner after Wh ch a Wax, sufficient to substantlall 7 pattern or impression of thecavity i's' madebyintroducing thereinto, andin'the "own manner, a quantity of dentists' fill the cavity. The wax is then withdrawn.

ally in the form ofa needle, w 'ich is-adapted upen being introduced "into the wax to Specification of Letters Patent. Application med m 28, 1914. Serial No. 853,682.

formed-oi" metal and may have any d a peel, usu-' tiqn it will lay force, be'force thedevice.

Patented'Jan. 12, 1 915.

' ADOLPHE BL'ArrsrEm, or nnwvonx, NIY.

attach or otherwise interlock itself therewith so that the waxwill be withdrawn from the cavity upon pulling the peel outwardly. By thus proceeding a pattern of the cavity of the tooth is had and this pattern is impinged on one end of the peel.

Novelty is not claimed for the proceeding thus far described since the essence of the present invention resides in the device for obtaining the casting of the-pattern just mentioned.

In adapting my invention'to' be used in connection with the hereinbefore stated pattern I provide a flask, a cover for the flask, and a' holder for the flask which holder may be readily rotated in acirclewhengheld in the hand. The flask is by: preference contour. Its volume will be sucha toadmit of its containing a pattern, or a lurality of these, when arrangedtherein in" the form of a cluster or in any other convenient arrangement, and a quantity of plasterof- Paris or an of the equivalents of this ma- 1 terial used y dentists in making molds.

The cover of the flask is provided with a boss or protuberance in its inner face which serves as a former. This former functions -to make a dished depression in the upper surface of the plaster mold when the cover is placed upon the flask and the latter filled with 'plaster-of-Paris. The provision of a .dished depression in the plaster mold prevents the molten metal from flowing over the sides of the flask during the operation of melting the metal. The cover is also provided with a socket or sockets into wh ch the free end or ends of the peel may be, Inserted. Thus, the cover functions as a support for the pattern during the" well known operation of applying a coating ofpla'ster of-Paris to the pattern.

The flask holder is adapted to be connected to the flask, and either before or after the efl'ecting' of this connection, the

molten Imetal is placedv into the, mold, so

esired that while the metal is in a melted condithe. action of centrifugal into the mold upon rotat1ng In the embodiment shown the .flask holder is indicated generally by a, the flask by b, and the flask-cover by c. In the form shown in Fig. 1, the flask holder d comprises a' ring 5 which is pivotally attached by screws 6 or their equivalents and at diametrically opposite points, to the arms 7-7 of a yoke formed of stout steel wire or its equivalent. The upper ends of the arms of this yoke are suitably connected to a shank 8, as by a nut 9 into one end of which the arms 77 are fitted and into the other end of which the .shanks 8 is screwed or otherwise securedj The shank 8 is pivotally connected to the handle 10 which in'the embodiment shown is arranged at an angle (preferably at right angle) to the shank 8. For convenience in mounting, the end of the shank 8 may be provided with an eye 11, through which passes a headed spindle 12, which is fas-. tened in the handle 10.

The flask b is an open ended hollow cylindrical structure of a size to nicely fit within the basket 13, formed integral with, 4

or otherwise suitably connected to the ring 5. The basket has an internal shoulder 14: which forms a support for the flask b, and thebottom of the basket below the shoulder 14 is provided with openings 15. The flask b is internally provided with a circular groove 16, which provides a means for permitting the plaster-of-Paris introduced in a soft state into the flask to interlock therew th, whereby'the plaster mold will be prevented from fallin or longitudinal displacement in the flas The cover a is provlded with a flange 17, which bears on the edge of the flask when the cover is arranged .as shown in Figs. 1 and 3, and the openlng 18 in the protuberance 19' of the cover is 4 usually filled with wax or its equivalent so as to retain the peel when the latter is introduced thereinto as indicated in Fig. 4. 7 With the form shown in Fig. 2, the basket 13 of F1g. 1 is eliminated and is substituted with the flask20 the upper end of which has a stepped flange 21, which bears upon the corresponding shaped inner surface of the mug 22 when the flask is arranged in the ring, as will be obvious. The yoke, a fragment of which is shown in F ig. 2, corresponds to the yoke shown in Fig. 1, and the pivotal connection 23, between the yoke and v the rmg is preserved as described for Fig. 1. The flask shown in Fig. 2, differs fromthatshown in Fig. 1, in that it combines the. flask and the basket structures, shown in the latter figure, that is to say, it is bottomed as indlcated by 24, and this bottom has 7 openings as indicated by 25. The cover 26 for the form shown in Fig. 2, corre's onds to thecover 17, previously describe ere cept that iaeaeaa p it has a stepped flange to accommodate the stepped flange 21 of the flask 20.

With the form shown in Fig. 3, the yoke 27,"has a loose connection with the shank28, so as to permit of the shank being held at an angle to the yoke. In this connection the flask a is removable "from the basket as described in connection with the form shown in Fig. 1. The basket 29 has openings 30 in the bottom thereof which correspond to the openings 15 and 2.5 in Figs. 1 and 2 respectively. In using any form of machine just described, a pattern as shown in Fig. 5 is provided. New, with the flask detached from the holder and arranged upright on a table, the pattern is inserted into the flask and the operator holding the peel keeps the pattern suspended a trifle above the lower edge of the flask. Plaster-of-Paris in a. plastic condition is then introduced into the flask and around the pattern. The quantity of plaster-of-Paris used is suflicient to approximately cover-is positioned on the flaskand forced downwardly into the plaster-of-Paris so as to form the dished upper end previously mentioned. Upon removing the cover, the end of the peel will be visible in the plaster and when the plaster is substantially set, the peel maybe withdrawn with a tweezer. When a single peel is used it is inserted in the opening 18 of the cover 0 as indicatd in Fig. 4' after the plaster of Paris has been placed in the flask and when the cover is applied to the flask the patternand peel are forced into the plaster.

The withdrawal of the peel leaves openings extending from the dished upper end of the plaster down to the pattern. The pat; tern is then melted out of the plaster 1n the usual manner. Thus when the metal 1s placed into the dished upper end of the plaster mold and the flask placed in the holder and the latter given several rotations by holding the handlelO in the hand the force which tends to move the metal from the flask by the rotation of the holder, will efl'ect the introduction of the molten metal into the openings left by the peel m the plaster and into the mold, so that after the device has been brought to rest, and sumcient time allowed for the same'to cool,

perfect castingswill be found upon break- .urpose of providing the holder with is connection is that when the sh t the adjusting inner f Y "f I is held in a horizontal position, the axis of a ring girotally connected theretoga flask. the ring and the flask contained therein, detacha 1y mounted in the ring, and a cover may extend vertically. having a central protuberance detachably' What I claim as new is mountedon the flask.

a ring attached thereto, a'zflask detachably in presence of tW-owitnesses.

mounted inithe ring, and a; c'over'ha'ving a V ADOLPHE ,BTTSTEINL central protuberance detachably-mounted'on Witnesses: x g the flask. Jon: A; DONEHUE,

10 2. A casting device comprising a. holder; 7 M. E. LAUGHLW l. A casting device comprising a holder, In testimony whereof ailix signature 15 

